figure 7.and on each side of it is a spring brass contactpiece. See Fig. 7. The discharging apparatus next claims ourattention. The supports are to be made of heavy glass Brass Cap … Glass TubeLead Wire figure 8. tubing, such as is used in the water gauges onsteam boilers. They are to be firmly set in theholes in the base, a little to one side of thecentral axis of the coil and to project about 4inches above the top of the coil. [6 SOMETHING ABOUT X RAYS. On the top of each…
X-rays · Fluorescence
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![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher05nati-128-77.webp)
